/* Copyright (c) 2023, Google Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #if !defined(_DEFAULT_SOURCE) #define _DEFAULT_SOURCE … #endif #include <openssl/rand.h> #include "../bcm_support.h" #include "sysrand_internal.h" #if defined(OPENSSL_RAND_GETENTROPY) #include <stdio.h> #include <stdlib.h> #include <unistd.h> #if defined(OPENSSL_MACOS) || defined(OPENSSL_FUCHSIA) #include <sys/random.h> #endif void CRYPTO_init_sysrand(void) {} // CRYPTO_sysrand puts |requested| random bytes into |out|. void CRYPTO_sysrand(uint8_t *out, size_t requested) { while (requested > 0) { // |getentropy| can only request 256 bytes at a time. size_t todo = requested <= 256 ? requested : 256; if (getentropy(out, todo) != 0) { perror("getentropy() failed"); abort(); } out += todo; requested -= todo; } } int CRYPTO_sysrand_if_available(uint8_t *buf, size_t len) { CRYPTO_sysrand(buf, len); return 1; } void CRYPTO_sysrand_for_seed(uint8_t *out, size_t requested) { CRYPTO_sysrand(out, requested); } #endif // OPENSSL_RAND_GETENTROPY